Important: This documentation covers Yarn 2. For the 1.x doc, check classic.yarnpkg.com.
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yarn npm info

Show information about a package.

Usage

$> yarn npm info [-f,--fields #0] [--json] ...

Examples

Show all available information about react (except the dist, readme, and users fields) :

yarn npm info react

Show all available information about react as valid JSON (including the dist, readme, and users fields) :

yarn npm info react --json

Show all available information about react 16.12.0 :

yarn npm info react@16.12.0

Show the description of react :

yarn npm info react --fields description

Show all available versions of react :

yarn npm info react --fields versions

Show the readme of react :

yarn npm info react --fields readme

Show a few fields of react :

yarn npm info react --fields homepage,repository

Details

This command will fetch information about a package from the npm registry, and prints it in a tree format.

The package does not have to be installed locally, but needs to have been published (in particular, local changes will be ignored even for workspaces).

Append @<range> to the package argument to provide information specific to the latest version that satisfies the range. If the range is invalid or if there is no version satisfying the range, the command will print a warning and fall back to the latest version.

If the -f,--fields option is set, it's a comma-separated list of fields which will be used to only display part of the package informations.

By default, this command won't return the dist, readme, and users fields, since they are often very long. To explicitly request those fields, explicitly list them with the --fields flag or request the output in JSON mode.

If the --json flag is set the output will follow a JSON-stream output also known as NDJSON (https://github.com/ndjson/ndjson-spec).